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ParamEdit — Parameter Table Editor

ParamEdit is a JavaFX tool for constructing and suggesting test parameter tables using coverage heuristics (pairwise, MC/DC, decision-tree guessing). It helps you design combinatorial test data without manually enumerating every combination.

Building and Running

Prerequisites: Java 21, Maven 3.6+

cd /path/to/modeljunit
mvn javafx:run -pl paramedit

Application Overview

ParamEdit opens with a menu bar (File, Suggestion) and a split view: parameter tables on top, suggestion results on the bottom.

ParamEdit launched

The interface shows:

  • Menu bar — File (Save/Load/Save as HTML) and Suggestion (Guess/MCDC/PairWise)
  • Table area (top) — one or more editable parameter tables with named columns
  • Suggestion area (bottom) — suggested parameter combinations from the selected strategy

Creating Parameter Tables

Each table has named columns representing test parameters and rows representing test cases. In the example above:

username password expected
admin secret123 success
user error_empty
pass error_no_user

You can:

  • Right-click on the table to add/delete rows and columns
  • Double-click a cell to edit its value
  • Add multiple tables for different test aspects

Suggestion Strategies

ParamEdit can automatically suggest additional test parameter combinations to improve coverage. Select a strategy from the Suggestion menu:

PairWise

Ensures every pair of parameter values appears in at least one test case. This is the most commonly used combinatorial strategy.

PairWise suggestions

The suggestion panel shows generated combinations — notice how it creates rows covering pairs like (admin, pass), (user, secret123), etc. that weren't in the original table.

Guess

Uses decision-tree analysis to identify missing combinations based on the existing data patterns.

MC/DC

Modified Condition/Decision Coverage — generates combinations that ensure each parameter value independently affects the outcome.

Undo/Redo

All table operations (add row, delete column, set value, etc.) support full undo/redo via the command pattern. Use Ctrl+Z / Ctrl+Y or the Edit menu.

File Operations

  • Save — serialises the story test (all tables) to a file
  • Load — loads a previously saved story test
  • Save as HTML — exports the tables as an HTML document

Next Steps